Table 2.

Mean ± S.E.M.s for the reaction times and choice reaction times (in seconds) as a function of condition (delay in seconds on standard and adjusting lever respectively) and the lever chosen (Delay or Immediate)

	0-0	2-0	4-0	8-0	16-0
Reaction time
Delay	1.63 ± 0.22	2.23 ± 0.79	2.01 ± 0.19	2.22 ± 0.46	4.40 ± 1.24
Immediate	1.86 ± 0.32	2.34 ± 0.45	2.14 ± 0.49	2.21 ± 0.46	3.65 ± 0.71
Choice reaction time
Delay	0.53 ± 0.06	0.49 ± 0.05	0.54 ± 0.08	0.55 ± 0.10	0.79 ± 0.21
Immediate	0.66 ± 0.09	0.69 ± 0.09	0.69 ± 0.08	0.71 ± 0.10	0.78 ± 0.15
		2-2	4-4	8-8	16-16
Reaction time
Delay		1.87 ± 0.31	1.67 ± 0.13	4.13 ± 0.89	10.97 ± 1.34
Immediate		1.94 ± 0.32	2.18 ± 0.38	3.10 ± 0.64	12.58 ± 2.66
Choice reaction time
Delay		0.57 ± 0.05	0.54 ± 0.07	0.68 ± 0.15	0.85 ± 0.20
Immediate		0.73 ± 0.11	0.77 ± 0.11	1.08 ± 0.42	1.47 ± 0.33

Note.

The reaction time is the time from trial initiation until the middle lever has been pressed. The choice reaction time is the time from middle lever press until the animal chooses either the adjusting or standard alternatives.